I really liked the original by Wiper, but I noticed the panels didn't fit and were too thick. I reduced the panel thickness to allow more light through. I updated the base to use a standard barrel style power supply and switch. The base is notched to allow the LED plug to sit flush and create a clean power plug look. I created a new lid with no question mark, it looked funny to me with a question mark on the lid. But if you like a question mark on the lid, simply print another side panel. I also created a simple cage to hold a LED strip. I originally planned on 2 rows of LED's, but decided to wrap it a 3rd time. It was bright enough with 2 rows of LED's, I was just lazy and didn't want to splice the wires :) .
I laid everything out so you will not need any supports, everything prints flat. I did use a 5mm brim on the panels, lid and top/bottom box parts. I had the base curl off the bed and didn't want to go through that again.
If I was to do it again, i would print the panels at 100% infill to get rid of the grid showing up when the LED's are on.
Power supply with switch https://www.amazon.com/AspenTek-Supply-Adapter-maxlength-Maxlength/dp/B00S1GRFYY
Use a 5mm brim on the panels, lid and box top/bottom.
Print 2 of the Question_LED.stl and glue together to make the LED tower. I also glued this to the base once it was in place to make it more rigid.
All of the STL's are laid out just how I printed them.